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VessRAID 1000i Series Product Manual
250
RAID 6 – Block and Double Parity Stripe
RAID level 6 stores dual parity data is rotated across the physical drives along
with the block data. A RAID 6 logical drive can continue to accept I/O requests
when any two physical drives fail.
Figure 5. RAID 6 stripes all drives with data and dual parity
Hence, a RAID 6 logical drive with (7) 100 GB physical drives will have a capacity
of 500 GB. A RAID 6 logical drive with (4) 100 GB physical drives will have a
capacity of 200 GB.
RAID 6 becomes more capacity efficient in terms of physical drives as the
number of physical drives increases.
RAID 6 provides double fault tolerance. Your logical drive remains available when
up to two physical drives fail.
RAID 6 is generally considered to be the safest RAID level.
A RAID 6 on VessRAID consists of 4 to 16 physical drives.
Double Distributed (Wide-space Q+Q) Parity
Physical Drives
Data
Blocks
- VessRAID 1
- Copyright 2
- Trademarks 2
- Recommendations 2
- Contents 11
- About This Manual 17
- VessRAID Overview 18
- Architectural Description 19
- Features and Benefits 19
- Operational Features 20
- Management 21
- Specifications 22
- Warranty and Support 24
- CE Statement 24
- FCC Statement 24
- KCC Statement 24
- Unpacking the VessRAID 25
- Mounting VessRAID in a Rack 29
- Installing Disk Drives 31
- Installing Your Disk Drives 33
- Direct Attached Storage (DAS) 34
- Storage Area Network (SAN) 36
- JBOD Expansion to DAS or SAN 38
- Connecting the Power 40
- Chapter 3: VessRAID Setup 43
- Default IP Addresses 44
- Setting up with the CLI 45
- Setting up with the CLU 47
- Making Automatic IP Settings 48
- Configuring the RAID 48
- Setting up with the LCD 49
- Logging into WebPAM PROe 51
- Selecting a Language 53
- Automatic 54
- Advanced 56
- Logging out of WebPAM PROe 57
- Using the Header 63
- Using Tree View 63
- Using Management View 64
- Viewing the Event Frame 65
- Viewing Other Subsytems 67
- Logging into a Subsystem 67
- Hiding the Other Subsystems 67
- Working with Subsystems 68
- Viewing the Runtime Event Log 69
- Saving the Runtime Event Log 70
- Viewing NVRAM Events 70
- Saving NVRAM Events 71
- Running Background Activities 73
- Running Media Patrol 73
- Viewing Scheduled Activities 74
- Scheduling an Activity 74
- Deleting a Scheduled Activity 75
- Viewing Lock Status 76
- Setting the Lock 76
- Renewing the Lock 76
- Making Your Own User Settings 79
- Changing Your Own Password 80
- Creating a User 81
- Viewing User Sessions 82
- Logging out Other Users 82
- Managing Storage Services 92
- Viewing the LUN Map 93
- Enabling LUN Masking 93
- Adding a LUN Map 93
- Editing a LUN Map 94
- Managing Software Services 95
- Making Netsend Settings 100
- Exporting the User Database 103
- Importing a User Database 103
- Updating the Firmware 105
- Restoring Factory Defaults 106
- Clearing Statistics 106
- Shutting Down the Subsystem 107
- Monitoring the Shutdown 108
- Starting Up After Shutdown 109
- Restarting the Subsystem 110
- Managing the Controller 111
- Viewing Controller Statistics 112
- Making Controller Settings 112
- Clearing an Orphan Watermark 113
- Managing Enclosures 115
- Viewing Enclosure Topology 116
- Viewing Enclosure Information 116
- Making Enclosure Settings 117
- Viewing FRU VPD Information 117
- Checking the Battery 118
- Reconditioning a Battery 119
- Silencing the Buzzer 119
- Making Buzzer Settings 119
- Testing the Buzzer 120
- Managing Physical Drives 121
- Adjustable Items 123
- Locating a Physical Drive 125
- Figure 8. Disk Status LED 126
- Disk Status 126
- Managing UPS Units 127
- Making UPS Settings 128
- Viewing UPS Information 129
- Managing Disk Arrays 130
- Step 1 – Disk Array Creation 133
- Deleting a Disk Array 135
- Making Disk Array Settings 136
- Creating a Logical Drive 137
- Deleting a Logical Drive 138
- Migrating a Disk Array 138
- Rebuilding a Disk Array 139
- Rebuilding Automatically 140
- Rebuilding Manually 140
- Running PDM on a Disk Array 141
- Transitioning a Disk Array 141
- Managing Logical Drives 143
- Logical Drive Status 144
- Logical Drive Synchronization 144
- Making Logical Drive Settings 145
- Initializing a Logical Drive 145
- Running Redundancy Check 146
- Table Definitions 148
- Managing Spare Drives 149
- Creating a Spare Drive 150
- Deleting Spare Drive 151
- Making Spare Drive Settings 151
- Running Spare Check 152
- Initial Connection 156
- Making a Telnet Connection 157
- Logging In 157
- Accessing Online Help 159
- Exiting the CLU 159
- Logging Out of the CLI 159
- Running Quick Setup 160
- Managing the Subsystem 161
- Resetting the Lock 162
- Releasing the Lock 162
- Locating the Controller 164
- Controller Status 165
- Managing the Enclosure 166
- Locating a Power Supply 167
- Viewing Cooling Unit Status 167
- Viewing Voltage Sensor Status 167
- Checking the Batteries 168
- Locating an Enclosure 169
- Setting an Alias 172
- Viewing Advanced Information 172
- Accepting an Incomplete Array 179
- Enabling PDM on a Disk Array 180
- Running PDM 182
- Locating a Disk Array 182
- Deleting a Spare Drive 187
- Setting Read Cache Policy 189
- Locating a Logical Drive 190
- Making Automatic Settings 191
- Making Manual Settings 191
- Making iSCSI Port Settings 192
- Managing iSCSI Connections 193
- Viewing iSCSI Target Ports 194
- Viewing the iSCSI Portal 195
- Viewing iSCSI Sessions 196
- Working with iSCSI iSNS 196
- Working with iSCSI CHAPs 197
- Adding CHAPs 198
- Editing CHAPs 198
- Viewing CHAPs 198
- Using iSCSI Ping 199
- Managing Background Activity 200
- Working with the Event Viewer 202
- Clearing NVRAM Events 203
- Working with LUN Mapping 204
- Mapping a LUN to an Initiator 205
- Deleting an Initiator 205
- Managing Users 209
- Changing a User’s Password 210
- Deleting a User 211
- Making Email Settings 212
- Making SLP Settings 213
- Making Web Server Settings 213
- Making Telnet Settings 214
- Making SNMP Settings 214
- Managing SNMP Trap Sinks 215
- Managing Netsend Recipients 216
- Deleting a Recipient 217
- Netsend Requirements 217
- Flashing through TFTP 218
- Using the LCD Panel 227
- Perusing the Interface 228
- Advanced Mode 229
- Limitations 229
- Viewing Events 229
- Manual IP Settings 230
- Automatic IP Settings 231
- Creating 236
- Verifying 236
- Creating a Disk Array 236
- Disk Array Status 239
- Locating a a Logical Drive 243
- Locating a Spare Drive 245
- Chapter 7: Maintenance 247
- Replacing a Power Supply 252
- Replacing a RAID Controller 253
- Replacing a Cooling Fan 254
- Replacing the Cache Battery 256
- Replacing the Memory Module 258
- Introduction to RAID 261
- RAID 0 – Stripe 262
- RAID 1 – Mirror 263
- RAID 1E – Enhanced Mirror 264
- RAID 10 – Mirror / Stripe 267
- RAID 50 Axles 269
- RAID 60 Axles 271
- Choosing a RAID Level 272
- Choosing Stripe Size 275
- Choosing Sector Size 275
- Cache Policy 276
- Read Cache Policy 277
- Write Cache Policy 277
- Adaptive Writeback Cache 277
- Capacity Coercion 278
- Initialization 278
- Hot Spare Drive(s) 279
- RAID Level Migration 280
- Media Patrol 287
- PDM Triggers 288
- Transition 289
- Automatic Transition 291
- Manual Transition 291
- Chapter 9: Troubleshooting 293
- LEDs Display Amber or Red 294
- Disk Drive LEDs 295
- LCD Panel 296
- Controller LEDs 296
- CLU Reports a Problem 298
- Checking a Reported Component 299
- WebPAM PROe Reports a Problem 300
- LCD Panel Reports a Problem 303
- Viewing a Report from OPAS 303
- Event Notification Response 305
- When a Physical Drive Fails 318
- With a Hot Spare Drive 319
- Without a Hot Spare Drive 319
- Rebuild Operation 320
- Incomplete Array 321
- Physical Drive Problems 322
- Enclosure Problems 324
- Connection Problems 327
- Network Connections 328
- Chapter 10: Support 333
- Contacting Technical Support 335
- Technical Support Services 336
- United States 336
- The Netherlands 336
- Attn: Technical Support 338
- Limited Warranty 339
- Your Responsibilities 340
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